Electroluminescences of ZnO nano-particles are observed under volts d.c. The contrast of EL spectra from some powders that dealt with different surfactant had been studied. The EL intensity of the ZnO powders can be enhanced in the sample deal with ODA and DDA by 8 times and 12 times respectively. The EL intensity of the ZnO sample dealt with ODA is stronger than that of the ZnO sample dealt with DDA under the same volts d.c. The peak at 406 nm should be most probably related to the defect levels of V_ Zn and the peak at 556 nm is attributed to the V_O.